Johannes Kepler

If the Earth were not a globe, the shadow of the Earth on the Moon would not be round.

I am much occupied with the investigation of the physical causes. My aim in this is to show that the celestial machine is to be likened not to a divine organism but to a clockwork.

The planets move in ellipses, with the Sun at one focus.

As the Sun is the source of light, so it is also the source of the moving power.

Geometry is unique and eternal, a reflection of the mind of God.

Where there is matter, there is geometry.

The Earth is a living creature, and its soul is the Sun.

I have spent my life trying to understand the harmony of the spheres.

The more accurately the astronomical observations are made, the more accurately the celestial motions can be described.

I believe that the universe is a perfect machine, created by a perfect God.

The planets do not move in perfect circles, but in ellipses.

I have tried to find the causes of the number, the size, and the motion of the planets.

The Sun is the center of the universe, and the planets revolve around it.

I have found the true causes of the motions of the planets, and I have demonstrated them with the help of God.

I have dedicated my life to the study of the heavens, and I have found nothing but wonder and awe.

The Earth is not the center of the universe, but a planet like the others.

I have discovered the secrets of the universe, and I have revealed them to the world.

The planets sweep out equal areas in equal times.

I have shown that the celestial machine is not a divine organism, but a clockwork.

The Sun is the motor of the universe, and its power extends to the farthest reaches of space.